name : module.audio.shorten.php <?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at https://github.com/JamesHeinrich/getID3 // // or https://www.getid3.org // // or http://getid3.sourceforge.net // // see readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.audio.shorten.php // // module for analyzing Shorten Audio files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_shorten extends getid3_handler { /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $this->fseek($info['avdataoffset']); $ShortenHeader = $this->fread(8); $magic = 'ajkg'; if (substr($ShortenHeader, 0, 4) != $magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($ShortenHeader, 0, 4)).'"'); return false; } $info['fileformat'] = 'shn'; $info['audio']['dataformat'] = 'shn'; $info['audio']['lossless'] = true; $info['audio']['bitrate_mode'] = 'vbr'; $info['shn']['version'] = getid3_lib::LittleEndian2Int(substr($ShortenHeader, 4, 1)); $this->fseek($info['avdataend'] - 12); $SeekTableSignatureTest = $this->fread(12); $info['shn']['seektable']['present'] = substr($SeekTableSignatureTest, 4, 8) == 'SHNAMPSK'; if ($info['shn']['seektable']['present']) { $info['shn']['seektable']['length'] = getid3_lib::LittleEndian2Int(substr($SeekTableSignatureTest, 0, 4)); $info['shn']['seektable']['offset'] = $info['avdataend'] - $info['shn']['seektable']['length']; $this->fseek($info['shn']['seektable']['offset']); $SeekTableMagic = $this->fread(4); $magic = 'SEEK'; if ($SeekTableMagic != $magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['shn']['seektable']['offset'].', found "'.getid3_lib::PrintHexBytes($SeekTableMagic).'"'); return false; } else { // typedef struct tag_TSeekEntry // { // unsigned long SampleNumber; // unsigned long SHNFileByteOffset; // unsigned long SHNLastBufferReadPosition; // unsigned short SHNByteGet; // unsigned short SHNBufferOffset; // unsigned short SHNFileBitOffset; // unsigned long SHNGBuffer; // unsigned short SHNBitShift; // long CBuf0[3]; // long CBuf1[3]; // long Offset0[4]; // long Offset1[4]; // }TSeekEntry; $SeekTableData = $this->fread($info['shn']['seektable']['length'] - 16); $info['shn']['seektable']['entry_count'] = floor(strlen($SeekTableData) / 80); //$info['shn']['seektable']['entries'] = array(); //$SeekTableOffset = 0; //for ($i = 0; $i < $info['shn']['seektable']['entry_count']; $i++) { // $SeekTableEntry['sample_number'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); // $SeekTableOffset += 4; // $SeekTableEntry['shn_file_byte_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); // $SeekTableOffset += 4; // $SeekTableEntry['shn_last_buffer_read_position'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); // $SeekTableOffset += 4; // $SeekTableEntry['shn_byte_get'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); // $SeekTableOffset += 2; // $SeekTableEntry['shn_buffer_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); // $SeekTableOffset += 2; // $SeekTableEntry['shn_file_bit_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); // $SeekTableOffset += 2; // $SeekTableEntry['shn_gbuffer'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); // $SeekTableOffset += 4; // $SeekTableEntry['shn_bit_shift'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); // $SeekTableOffset += 2; // for ($j = 0; $j < 3; $j++) { // $SeekTableEntry['cbuf0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); // $SeekTableOffset += 4; // } // for ($j = 0; $j < 3; $j++) { // $SeekTableEntry['cbuf1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); // $SeekTableOffset += 4; // } // for ($j = 0; $j < 4; $j++) { // $SeekTableEntry['offset0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); // $SeekTableOffset += 4; // } // for ($j = 0; $j < 4; $j++) { // $SeekTableEntry['offset1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); // $SeekTableOffset += 4; // } // // $info['shn']['seektable']['entries'][] = $SeekTableEntry; //} } } if (preg_match('#(1|ON)#i', ini_get('safe_mode'))) { $this->error('PHP running in Safe Mode - backtick operator not available, cannot run shntool to analyze Shorten files'); return false; } if (GETID3_OS_ISWINDOWS) { $RequiredFiles = array('shorten.exe', 'cygwin1.dll', 'head.exe'); foreach ($RequiredFiles as $required_file) { if (!is_readable(GETID3_HELPERAPPSDIR.$required_file)) { $this->error(GETID3_HELPERAPPSDIR.$required_file.' does not exist'); return false; } } $commandline = GETID3_HELPERAPPSDIR.'shorten.exe -x "'.$info['filenamepath'].'" - | '.GETID3_HELPERAPPSDIR.'head.exe -c 64'; $commandline = str_replace('/', '\\', $commandline); } else { static $shorten_present; if (!isset($shorten_present)) { $shorten_present = file_exists('/usr/local/bin/shorten') || `which shorten`; } if (!$shorten_present) { $this->error('shorten binary was not found in path or /usr/local/bin'); return false; } $commandline = (file_exists('/usr/local/bin/shorten') ? '/usr/local/bin/' : '' ) . 'shorten -x '.escapeshellarg($info['filenamepath']).' - | head -c 64'; } $output = `$commandline`; if (!empty($output) && (substr($output, 12, 4) == 'fmt ')) { if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true); $fmt_size = getid3_lib::LittleEndian2Int(substr($output, 16, 4)); $DecodedWAVFORMATEX = getid3_riff::parseWAVEFORMATex(substr($output, 20, $fmt_size)); $info['audio']['channels'] = $DecodedWAVFORMATEX['channels']; $info['audio']['bits_per_sample'] = $DecodedWAVFORMATEX['bits_per_sample']; $info['audio']['sample_rate'] = $DecodedWAVFORMATEX['sample_rate']; if (substr($output, 20 + $fmt_size, 4) == 'data') { $info['playtime_seconds'] = getid3_lib::SafeDiv(getid3_lib::LittleEndian2Int(substr($output, 20 + 4 + $fmt_size, 4)), $DecodedWAVFORMATEX['raw']['nAvgBytesPerSec']); } else { $this->error('shorten failed to decode DATA chunk to expected location, cannot determine playtime'); return false; } $info['audio']['bitrate'] = getid3_lib::SafeDiv($info['avdataend'] - $info['avdataoffset'], $info['playtime_seconds']) * 8; } else { $this->error('shorten failed to decode file to WAV for parsing'); return false; } return true; } }